﻿#region License

// Dimebrain TweetSharp
// (www.dimebrain.com)
// 
// The MIT License
// 
// Copyright (c) 2009 Dimebrain
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 

#endregion

using System;
using Newtonsoft.Json;

namespace Dimebrain.TweetSharp.Model.Twitter.Converters
{
    // note custom converters need to be public in silverlight for activator creation
    public class TwitterDateTimeConverter : TwitterConverterBase
    {
        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            if (value is TwitterDateTime)
            {
                writer.WriteValue(value.ToString());
            }

            if(value is DateTime)
            {
                var dateTime = (DateTime) value;
                var converted = TwitterDateTime.ConvertFromDateTime(dateTime, TwitterDateFormat.RestApi);
                
                writer.WriteValue(converted);
            }
        }

        public override object ReadJson(JsonReader reader, Type objectType, JsonSerializer serializer)
        {
            if (reader.TokenType == JsonToken.Null)
            {
                return null;
            }

            var value = reader.Value.ToString();
            var date = TwitterDateTime.ConvertToDateTime(value);

            return date;
        }

        public override bool CanConvert(Type objectType)
        {
            var t = (IsNullableType(objectType))
                        ? Nullable.GetUnderlyingType(objectType)
                        : objectType;

            return typeof (DateTime).IsAssignableFrom(t) ||
                   typeof (DateTimeOffset).IsAssignableFrom(t);
        }
    }
}